Asimple poker machine consists of two wheels. on each wheel there are pictures of five different animals; one each of a kangaroo (k), an emu (e), a platypus (p), a dingo (d)and a wombat (w). when a player pulls the arm of the machine, each of the wheels spin individually and independently and comes to rest with a picture of one of the animals in theviewing window. the player who pulls the arm thus sees pictures of two animals.